The tension began in the late 2016 soon after ISIL beheaded a group of Assyrian priest in Syria. This caused Christian churches to hold mass protests against several Islamic institutions. In November 1, 2016, the Christian terrorist organization, Holy Kingdom of Jerusalem launched an terrorist attack at a mosque in Istanbul killing 77 people and injuring 120 more. An hour after the incident, the Islamic State released a video showing the beheading of Amadeus Damascus, Kingdom of Jerusalem's chief commander in Syria.